*{
    /* 初始化 */
    margin:0;
    padding:0;
}

body{
    /* 100%窗口高度 */
    height:100vh;
    /* 弹性布局  水平+垂直居中 */
    display:flex;
    justify-content:center;
    align-items:center;
    /* 渐变背景 */
    background: linear-gradient(200deg,#37e2b2,#2fa080);
}
/* .container{
    border:1px solid red;
} */
/* 开始画熊猫 */
.panda{
    /* 相对定位 */
    position:relative;
    width:200px;
}
.face{
    width:200px;
    height:200px;
    background-color: #fff;
    border-radius: 100%;
    box-shadow: 0 10px 15px rgba(0,0,0,0.15);
    position:relative;
    z-index:1;
}
.ear{
    width:70px;
    height:70px;
    background-color: black;
    border-radius: 100%;
    position:absolute;
    top:-10px;
}
.ear.right{
    right:0;
}
/* 黑眼圈 */
.eye-shadow{
    width:50px;
    height:80px;
    background-color: black;
    border-radius: 50%;
    /* 绝对定位 */
    position:absolute;
    top:40px;
}
.eye-shadow.left{
    transform:rotate(45deg);
    left:30px;
}
.eye-shadow.right{
    transform:rotate(-45deg);
    right:30px;
}
/* 眼白 */
.eye-white{
    width:30px;
    height:30px;
    background-color: #fff;
    border-radius: 100%;
    position:absolute;
    top:68px;
}
.eye-white.left{
    left:38px;
}
.eye-white.right{
    right:38px;
}
/* 眼球 */
.eye-ball{
    width:20px;
    height:20px;
    background-color: #000;
    border-radius: 100%;
    position:absolute;
    left:5px;
    right:5px;
}
/* 鼻子 */
.nose{
    width:35px;
    height:20px;
    background-color: #000;
    position:absolute;
    left:0;
    right:0;
    margin:auto;
    bottom:65px;
    border-radius: 42px 42px 60px 60px / 30px 30px 60px 60px;
}
/* 嘴巴 */
.mouth{
    width:68px;
    height:25px;
    border-bottom: 7px solid #000;
    border-radius: 50%;
    position:absolute;
    left:0;/*疑惑*/
    right:0;
    margin:auto;
    bottom:35px;
}
/* 身体 */
.body{
    width:250px;
    height:280px;
    background-color: #fff;
    position:relative;
    left:-25px;
    top:-10px;
    border-radius: 100px 100px 100px 100px / 126px 126px 96px 96px;
    box-shadow:0 5px 10px rgba(0,0,0,0.3);
}

.foot{
    width:82px;
    height:120px;
    background-color: #000;
    position:absolute;
    bottom:8px;
    z-index: 3;
    border-radius: 40px 40px 35px 40px / 26px 26px 63px 63px;
    box-shadow: 0 5px 5px rgba(0,0,0,0.2);
}
.foot.left{
    left:-80px;
}
.foot.right{
    right:-80px;
    transform:rotateY(180deg);
}
/* 脚掌 大椭圆 */
.foot::after{
    content:"";
    width:55px;
    height:65px;
    background-color: #222;
    position:absolute;
    border-radius: 50%;
    left:0;
    right:0;
    margin:auto;
    bottom:10px;
}
/* 脚掌-三个小椭圆 */
.foot .sole,
.foot .sole::before,
.foot .sole::after{
    width:20px;
    height:30px;
    background-color: #222;
    position:absolute;
    border-radius: 50%;
    left:0;
    right:0;
    margin:auto;
    top:8px;
}
.foot .sole::before{
    content:"";
    left:-50px;
}
.foot .sole::after{
    content:"";
    left:25px;
}
/* 手 */
.hand,
.hand::before,
.hand::after{
    width:40px;
    height:30px;
    background-color: #000;
    border-radius: 50px;
    position:absolute;
    top:70px;
    left:-20px;
}
.hand::before{
    content:"";
    top:16px;
    left:0;
}
.hand::after{
    content:"";
    top:32px;
    left:0;
}
.hand.right{
    right:-20px;
    left:auto;
}

/* 登录框 */
.login-box{
    width:400px;
    height:300px;
    background-color: #fff;
    border-radius: 10%;
    box-shadow: 0 0 15px rgba(0,0,0,0.2);
    position:absolute;
    left:50%;
    top:50%;
    transform:translate(-50%,-110px);
    z-index: 2;
    display:flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    /* 设置过渡 */
    transition:0.3s;
}
h1{
    color:#1dc797;
    font-weight: normal;
    margin-bottom: 5px;
}
.ipt-box{
    width:80%;
    margin-top: 25px;
    /* border:1px solid red; */
    position:relative;
}
.ipt-box input{
    width:100%;
    height:35px;
    border:none;
    border-bottom: 1px solid #bbb;
    text-indent: 5px;
    outline:none;
    transition:0.3s;
}
.ipt-box label{
    position:absolute;
    left:5px;
    top:5px;
    font-size:14px;
    color:#888;
    transition:0.3s;
    pointer-events:none;/*疑惑*/
}
/* 输入框选中或有值时输入框的样式 */
.ipt-box input:focus,
.ipt-box input:valid{
    border-color: #1dc797;
    box-shadow: 0 1px #1dc797;
}
/* 输入框选中或有值时label的样式 */
.ipt-box input:focus ~ label,
.ipt-box input:valid ~ label{
    border-color: #1dc797;
    font-size: 12px;
    /* Y轴向上变动15px */
    transform:translateY(-15px);
}
button{
    width:150px;
    height:40px;
    background-color: #1dc797;
    border:none;
    border-radius: 3px;
    margin-top: 30px;
    color:#fff;
    /* 控制字母间的间距 */
    letter-spacing: 10px;

    /* 控制第一行文本缩进 */
    text-indent: 10px;
    /* 控制鼠标变为手指形状 */
    cursor: pointer;
    transition:0.3s;
}
button:hover{
    letter-spacing: 25px;
    text-indent: 25px;
    background-color: #2fa080;
}
.up{
    transform:translate(-50%,-180px);
}